A high-ranking French intelligence official told CNN today that one Rafale fighter jet operated by the Indian Air Force was downed by Pakistan, in what would mark the first time that one of the sophisticated French-made warplanes has been lost in combat.

Pakistan claimed to have shot down five Indian Air Force jets in retaliation for Indian strikes, including three Rafales. Indian officials are yet to respond to the claim, the broadcasting network said.

The French official told CNN that French authorities were looking into whether more than one Rafale jets were shot down by Pakistan overnight. Pictures taken of parts of an aircraft that crashed in occupied Kashmir show the label of a French manufacturer, according to CNN, but experts said it was not possible to say whether the part came from a Rafale aircraft.

Dassault Aviation, the French manufacturer of the jet, has not responded to CNN’s requests for comment.

The French military has not officially commented on the incident.